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(No Mbdel.)

I, J. A. SEELY,

, GALVANIG BATTERY. No. 369,034. Patented Aug. 30, 1887.

I Jwwwboz 3331 W Grimm EEE==== x 7 Y U Q UN TED STATES PATENT FFICE.

JOHN A. SEELY, OF NEW YORK, N. Y.

GALVAN l C BATTERY.

SPECIFICATION forming part of Letters Patent No. 369,034, dated August30. 3

Application filed August 12, 1885.

To all whom it may concern.-

Be it known that I, JOHN A. SEELY, a citizen of the United States ofAmerica, residing in the city, county, and State of New York, have madea new and useful Improvement in Galvanic Batteries, of which thefollowing is a specification.

The object of my invention is, first, to provide an air-tight cover forbattery-jars which shall serve the purpose of preventing gases arisingfrom the battery solutions within said jars from escaping therefrom,and'to thus prevent said gases from attacking and destroying theelectrical contacts by which electrical conductors are connected withthe battery elements. I

The second object of my invention is to provide a carbon plate forgalvanic batteries having a large surface exposed to the batterysolution in proportion to the volume of material employed in said plate.7

Figure 1 represents a side view of my battery-jar in which theeoveringcap is partially shown in section. Fig. 2 is a perspective viewshowing the battery-cover and my improved carbon electrode, and also thevarious other parts of the battery.

A B is a cap having a downwardly-projecting flange and a plane top. Thezine electrode Z and the carbon electrode 0 project upwardly throughclosely-fitting apertures in the top of the battery-cover, and theflange B of the said cover is pressed tightly over and around the top ofthe battery-jar, said jar being shown in the drawings in dotted lines.The body of said battery-cover is preferably formedof two or threethicknesses of strong canvas or other suitable flexible fabric. Thisbody is then covered upon its inner and outer surfaces with softindia-rubber, which, after being applied to said canvas in the form of apaste or liquid, is vulcanized, but only to a degree to render theentire mass of said cover flexible. I find that nine thirty-seconds ofan inch (more or less) is a suitable thickness of rubber to be appliedupon the canvas body of the cover. The canvas body of the cover A B thusprovidedwith vulcanized india-rubber is-made with apertures slightlysmaller than Serial No. 174,179. (No model.)

the crosssections of the upper ends of the battery elements. Suchapertures afford a practact with the upper edge of the glass jar, evenwhen the horizontal cross'section ot' thejar considerably varies from acircle, as is shown in Fig. 2.

The upper extremity of the zinc element Z is provided with a setscrew,a, and an aperture,j, within which to thrust the end of aconducting-wire, while the lower end, 70, of said zinc projects into thebattery-fluid. The carbon element 0 is provided with a series of deepgrooves upon both ofits sides, and said grooves are so formed that eachhas two inclined surfaces, d and m.- Preferably at the bottom of saidgroove is a flat surface of considerable width. The top of eachcorrugation may be of a narrow flat surface, or it may be formed by theangle of the two surfaces (1 and m. The upper portion, a, of thecarbonelement 0 has its projecting ridges removed, thus leaving planesurfaces for contact with the walls of the apertures through thebatterycover. v

1) represents a suitable binding-post for connecting an electricalconductor with carbon element 0.

I am aware that others have heretofore constructed battery-plates withfluted corrugations, thus leaving very narrow spaces between adjoiningflutes or ridges. My object, however, in ridging the surfaces of thecarbon element is to arrange the two opposite surfaces of each groove ata considerable distance apart, in order that a large amount ofbatteryfluid may be included between them, and to thus avoid theexcessive polarization in the battery-fluid, which would result if thefacing surfaces of the grooves were very close together.

It is obvious that my battery-cover hereinbefore described is applicablenot only to a galvanic carbon battery, but as well to all from thesolution, and that it is also applicaand flange B, said cover beingformed of a ble to those batteries Where a tight cover may body ofcanvas or other suitable material and be necessary for any purposeWhatever. a coating of soft vulcanized india-rubber.

What Iclaim, and desire to secure by Letters 3. A battery-cover having atop, A, and a I 5 5 Patent, isdownwardly-projecting flange, B, formedof 1. A battery-cover having a plane top, A, suitable flexible andelastic material, as and andadownwardlyprojecting flange, B, formed forthe purpose described.

of canvas and a flexible coating of vulcanized JOHN A. SEELY.india-rubber. Witnesses:

1o 2. A battery-cover having apertures for the \VM. ARNOUX,

battery elements Z 0, having a plane top, A J AS. H. StmaLLGEs.

